The mass of an object is 45 kilograms. Its weight on Earth is ___ newtons, and its weight on the Moon is ___ newtons. Gravitational force is 9.8 m/s2 on Earth and 1.6 m/s2 on the Moon.

carbon atoms, hydrogen, oxygen, and nitrogen.

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.